Product Price Frequency Response (Hz) Max Peak SPL (dB) Frequency Response Accuracy (%) THD at 90dB (%) Crossover Frequency (Hz) Impedance (Ohms)
Stanford Research Systems SR1 Dual-Domain Audio Analyzer
US
£12536.42 10 Hz to 200 kHz ±0.008 dB from 20 Hz to 20 kHz

The SR1 is a professional dual-domain audio analyzer for precise analog and digital testing, with measurements up to 200 kHz, dual-channel FFTs, flexible signal generation, and digital audio interface analysis. It suits audio manufacturers, laboratories, and demanding test engineers who need very low distortion and noise performance.

★ Ideal for

It suits the question because its analog analyzer noise floor is specified at ≤-118 dBu, alongside ≤-112 dB THD+N and ±0.008 dB frequency-response flatness.

Ono Sokki CF-9200 Portable FFT Analyzer
US
£961495.08 DC to 100 kHz ±0.1 dB at 1 kHz 1 MΩ ±0.5%, 100 pF or less

The CF-9200 is a portable two-channel FFT analyzer with a 10.4in touchscreen, 24-bit A/D converter, battery operation, and analysis bandwidth up to 100 kHz. It suits field engineers and laboratories measuring noise, vibration, resonance, and frequency characteristics without needing an external PC.

★ Ideal for

It is a strong fit for finding a low-noise-floor studio monitor frequency response analyzer because it provides a 120 dB or greater dynamic range, harmonic distortion below -80 dB under 20 kHz, and ±0.1 dB full-scale accuracy at 1 kHz.